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These corals are dead—smothered in sediments and overgrown with algae.
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Dead Coral Overgrown with Algae

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Shallow water coral reefs straddle the equator worldwide.
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Global Distribution of Shallow Coral Reef Ecosystems

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corals of many colors in the deep sea
Article

Deep Gulf Restoration After a Monumental Oil Spill

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Convict surgeonfish are the roaming sheep of the reef but, instead of noshing on grass, they feed on algae.
Article

Helpful Herbivores

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Pygmy Seahorse Blends Into its Environment
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Eye to Eye With a Pygmy Seahorse

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A purple hard coral releases bundles of pink eggs glued together with sperm.
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Coral Spawning

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Colorful fishes throng a reef in the Northwestern Hawaiian Islands.
Slideshow

Bizarre and Beautiful Coral Reef Animals

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An underwater photo of coral recovering from a bleaching event.
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Resilient Coral

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Many medicines were based on a chemical from the sea sponge Tectitethya crypta.
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From Sea Sponge to HIV Medicine

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Convict surgeonfish are the roaming sheep of the reef but, instead of noshing on grass, they feed on algae.
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Surgeonfish: Indicators of a Healthy Reef

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Carrie Bow Cay field station sits in the blue and turquoise waters of Belize.
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Aerial View of Carrie Bow Cay Field Station, Belize

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Pink crustose algae covers the surface of a rock.
Article

Microbes Help Corals Pick a Home and Settle Down

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